GB738850A - Improvements in or relating to the manufacture of photo-electric sensitive or secondary electron emissive surfaces - Google Patents
Improvements in or relating to the manufacture of photo-electric sensitive or secondary electron emissive surfacesInfo
- Publication number
- GB738850A GB738850A GB366253A GB366253A GB738850A GB 738850 A GB738850 A GB 738850A GB 366253 A GB366253 A GB 366253A GB 366253 A GB366253 A GB 366253A GB 738850 A GB738850 A GB 738850A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bismuth
- silver
- deposited
- photo
- relating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
- H01J40/02—Details
- H01J40/04—Electrodes
- H01J40/06—Photo-emissive cathodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/32—Secondary emission electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/34—Photoemissive electrodes
Abstract
In one modification of a method whereby successive bismuth and silver layers aare deposited on a cathode by evaporation, this is done from a single source of an alloy of silver and bismuth, preferably in equal parts. In another modificaiton to the step whereby the bismuth is oxidized through the silver layer by simple exposure to oxygen this is carried out above room temperaature, for example 150 DEG C. The bismuth layer may be five to ten atoms thick, or alternatively be so thick as to be opaque, and it may be deposited on a glass envelope. After oxidaation caesium may be deposited on the silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB366253A GB738850A (en) | 1953-02-10 | 1953-02-10 | Improvements in or relating to the manufacture of photo-electric sensitive or secondary electron emissive surfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB366253A GB738850A (en) | 1953-02-10 | 1953-02-10 | Improvements in or relating to the manufacture of photo-electric sensitive or secondary electron emissive surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB738850A true GB738850A (en) | 1955-10-19 |
Family
ID=9762566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB366253A Expired GB738850A (en) | 1953-02-10 | 1953-02-10 | Improvements in or relating to the manufacture of photo-electric sensitive or secondary electron emissive surfaces |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB738850A (en) |
-
1953
- 1953-02-10 GB GB366253A patent/GB738850A/en not_active Expired
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